Fly ash-derived zeolite materials could be used as catalysts for the pyrolysis of polypropylene. This study focused on the conversion of coal fly ash into zeolites by the fusion method. It follows our previous study that concentrated on the change of activity of synthetic zeolites with respect to the NaOH fusion ratio. In the previous study, the activity change of a synthetic zeolite was investigated for the pyrolysis of polypropylene. This study concentrates upon the change in the synthetic zeolites upon changes to the crystallization temperature and time, rather than the fusion ratio. The characterization of the fly ash-derived zeolite materials was carried out in terms of analyses of the crystalline structure (XRD), BET specific surface area, and catalytic performance for the pyrolysis of polypropylene. In this study, the zeolites synthesized from coal fly ash were zeolite types X, NaPl, and hydroxysodalite. For the pyrolysis of polypropylene, these synthetic zeolites showed much higher reactivity than observed when no catalyst was used. Among the three types of flyash-derived zeolite materials, zeolite X showed the highest catalytic performance. Zeolite X resulted in a lower degradation temperature than did either NaPl or hydroxysodalite. It also gave a lower boiling point distribution of liquid products than did the other synthetic zeolites. It seems that these results occurred because of the larger pore size of zeolite X than that of the others. In the fusion method, the effective conditions for the synthesis of zeolite X were a crystallization temperature of 100℃ at each crystallization time.